A method for operating an access node includes generating a configuration message including information specifying a set of reference signals of a first reference signal type and a set of reference signals of a second reference signal type used to identify a new beam, and information specifying random access channel resources allocated for transmitting preamble sequences, wherein each random access channel resource is associated with a reference signal of the first reference signal type, sending, to one or more user equipments (UEs), the configuration message, receiving, from a UE, a preamble sequence on one of the random access channel resources, and determining an identity of the UE in accordance with the preamble sequence and the one of the random access channel resources.
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2. The method of claim 1, wherein each of the synchronization signals for beam failure recovery is individually associated with at least one of the RACH resources for beam failure recovery.
3. The method of claim 1, wherein the beam failure recovery configuration message further indicates a preamble sequence for the RACH resources for beam failure recovery.
6. The method of claim 5, wherein the control channel comprises a physical downlink control channel (PDCCH).
7. The method of claim 5, wherein the control channel is quasi-co- located with the at least one of the synchronization signals identified by the indication received over the RACH resources for beam failure recovery.
9. The network device of claim 8, wherein each of the synchronization signals for beam failure recovery is individually associated with at least one of the RACH resources for beam failure recovery.
10. The network device of claim 8, wherein the beam failure recovery configuration message further indicates a preamble sequence for the RACH resources for beam failure recovery.
11. The network device of claim 8, wherein the programming further includes instructions to send a radio resource control (RRC) message to the UE indicating that at least one of the synchronization signals for beam failure recovery is quasi-co-located with one of the reference signals for beam failure recovery.
13. The network device of claim 12, wherein the control channel comprises a physical downlink control channel (PDCCH).
14. The network device of claim 12, wherein the control channel is quasi-co-located with the at least one of the synchronization signals identified by the indication received over the RACH resources for beam failure recovery.
16. The method of claim 15, wherein each of the synchronization signals for beam failure recovery is individually associated with at least one of the RACH resources for beam failure recovery.
17. The method of claim 15, wherein the beam failure recovery configuration message further indicates a preamble sequence for the RACH resources for beam failure recovery.
20. The method of claim 19, wherein the control channel comprises a physical downlink control channel (PDCCH).
21. The method of claim 19, wherein the control channel is quasi-co- located with the at least one of the synchronization signals identified by the indication received over the RACH resources for beam failure recovery.
23. The network device of claim 22, wherein each of the synchronization signals for beam failure recovery is individually associated with at least one of the RACH resources for beam failure recovery.
24. The network device of claim 22, wherein the beam failure recovery configuration message further indicates a preamble sequence for the RACH resources for beam failure recovery.
27. The network device of claim 26, wherein the control channel comprises a physical downlink control channel (PDCCH).
28. The network device of claim 26, wherein the control channel is quasi-co-located with the at least one of the synchronization signals identified by the indication received over the RACH resources for beam failure recovery.
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March 16, 2020
June 20, 2023
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